package com.pms.util;

import java.security.MessageDigest;

public class MD5Utils {
	private static final String hexDigits[] = { "0", "1", "2", "3", "4", "5",
		    "6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };
	public static String byteArrayToHexString(byte b[]) {
    StringBuffer resultSb = new StringBuffer();
    for (int i = 0; i < b.length; i++)  
        resultSb.append(byteToHexString(b[i]));  

    return resultSb.toString();  
}  

private static String byteToHexString(byte b) {
    int n = b;  
    if (n < 0)  
        n += 256;  
    int d1 = n / 16;  
    int d2 = n % 16;  
    return hexDigits[d1] + hexDigits[d2];  
}  

public static String MD5Encode(String origin, String charsetname) {
    String resultString = null;
    try {  
        resultString = new String(origin);
        MessageDigest md = MessageDigest.getInstance("MD5");
        if (charsetname == null || "".equals(charsetname))  
            resultString = byteArrayToHexString(md.digest(resultString  
                    .getBytes()));  
        else  
            resultString = byteArrayToHexString(md.digest(resultString  
                    .getBytes(charsetname)));  
    } catch (Exception exception) {
    }  
    return resultString;  
}  


}
